We may form a stereotype of someone after judging only one thing they do.

We get afflicted when encountering people we dislike because the entrenched biases and stereotypes we have towards them arise instantly and keep reinforcing our negative emotions, blinding us and making us irrational.

[A Word of Chan]

We get afflicted when encountering people we dislike because the entrenched biases and stereotypes we have towards them arise instantly and keep reinforcing our negative emotions, blinding us and making us irrational. We may form a stereotype of someone after judging only one thing they did, and from then on we will mistakenly think this is all they are.